Shaikh, Shoyebmohamad F. Mane, Rajaram S. Hwang, Yun Jeong Joo, Oh-Shim 2024-01-20T07:00:39Z 2024-01-20T07:00:39Z 2021-09-04 2015-06-10 0013-4686 https://pubs.kist.re.kr/handle/201004/125333 In dye-sensitized solar cells (DSSCs), a surface passivation layer has been employed on the tin oxide (SnO2) photoanodes to enhance the charge collection efficiency, and thus the power conversion efficiency. Herein, we demonstrate that the electronic-insulating layering of calcium carbonate (CaCO3) can improve the charge collection efficiency in dye-sensitized solar cells designed with photoanodes. In order to evaluate the effectiveness of CaCO3 layering, both layered and pristine SnO2 photoanodes are characterized with regard to their structures, morphologies, and photo-electrochemical measurements. The SnO2-6L CaCO3 photoanode has demonstrated as high as 3.5% power conversion efficiency; 3.5-fold greater than that of the pristine SnO2 photoanode. The enhancement in the power conversion efficiency is corroborated with the number of the dye molecules, the passivation of surface states, a negative shift in the conduction band position, and the reduced electron recombination rate of photoelectrons following the coating of the CaCO3 surface layer. (C) 2015 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD NANOCRYSTALLINE TIO2 PHOTOVOLTAIC PERFORMANCE ENHANCEMENT SPECTROSCOPY ADSORPTION SHELL Calcium carbonate electronic-insulating layers improve the charge collection efficiency of tin oxide photoelectrodes in dye-sensitized solar cells Article 10.1016/j.electacta.2015.03.086 1 ELECTROCHIMICA ACTA, v.167, pp.379 - 387 ELECTROCHIMICA ACTA 167 379 387 scie scopus 000354053400049 2-s2.0-84926388165 Electrochemistry Electrochemistry Article NANOCRYSTALLINE TIO2 PHOTOVOLTAIC PERFORMANCE ENHANCEMENT SPECTROSCOPY ADSORPTION SHELL Dye-sensitized solar cell Hydrothermal synthesis Surface passivation Charge collection efficiency